an introduction to the TV scope

An oscilloscope is, without doubt, the single most useful piece of electronic test equipment and is, for many tasks, virtually indispensable. Unfortunately, the high cost of oscilloscopes puts them beyond the reach of many electronics enthusiasts. A major proportion of the cost of an oscilloscope is accounted for by the cathode-ray tube and its associated high-voltage power supplies. By using a normal, domestic TV set as the display the TV scope eliminates this cost and allows the construction of an oscilloscope for a very modest outlay. The principles of the TV scope and a basic version of the instrument are described this month. Next month`s issue will discuss the extension of the basic · TV scope into a `deluxe` version.